Example usage for java.lang Math round

Introduction

In this page you can find the example usage for java.lang Math round.

Prototype

public static long round(double a)

Source Link

Document

Returns the closest long to the argument, with ties rounding to positive infinity.

Usage

From source file:Main.java

private static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {
        final int heightRatio = Math.round((float) height / (float) reqHeight);
        final int widthRatio = Math.round((float) width / (float) reqWidth);
        inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
    }// www  .ja  v  a 2s  .co  m

    return inSampleSize;
}

From source file:Main.java

/**
 * Decode a file from the path and return a bitmap
 * @param uri/*from  w w w  .j  ava2  s.  com*/
 * @param context
 * @return
 */
public static Bitmap decodeFileFromPath(Uri uri, Context context) {

    InputStream in = null;
    try {
        in = context.getContentResolver().openInputStream(uri);

        //Decode image size
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;

        BitmapFactory.decodeStream(in, null, o);
        in.close();

        int scale = 1;
        int inSampleSize = 1024;
        if (o.outHeight > inSampleSize || o.outWidth > inSampleSize) {
            scale = (int) Math.pow(2, (int) Math.round(
                    Math.log(inSampleSize / (double) Math.max(o.outHeight, o.outWidth)) / Math.log(0.5)));
        }

        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        in = context.getContentResolver().openInputStream(uri);
        Bitmap b = BitmapFactory.decodeStream(in, null, o2);
        in.close();

        return b;

    } catch (FileNotFoundException e) {
        //e.printStackTrace();
    } catch (IOException e) {
        //e.printStackTrace();
    }
    return null;
}

From source file:Main.java

@SuppressWarnings("deprecation")
public static int PutImageScale(Canvas canvas, Drawable image, double Angle, int x, int y, double scale) {

    if (scale == 0.0)
        return 0;

    float newWidth = (int) Math.round((float) image.getIntrinsicWidth() * scale);
    float newHeight = (int) Math.round((float) image.getIntrinsicHeight() * scale);

    Bitmap bmp = ((BitmapDrawable) image).getBitmap();
    int width = bmp.getWidth();
    int height = bmp.getHeight();

    float scaleWidth = ((float) newWidth) / width;
    float scaleHeight = ((float) newHeight) / height;
    // createa matrix for the manipulation
    Matrix matrix = new Matrix();
    // resize the bit map
    matrix.postScale(scaleWidth, scaleHeight);
    // rotate the Bitmap
    matrix.postRotate((float) Angle);
    // recreate the new Bitmap
    Bitmap resizedBitmap = Bitmap.createBitmap(bmp, 0, 0, width, height, matrix, true);
    // make a Drawable from Bitmap to allow to set the BitMap
    // to the ImageView, ImageButton or what ever
    BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);

    bmd.setBounds(x, y, x + bmd.getIntrinsicWidth(), y + bmd.getIntrinsicHeight());
    bmd.draw(canvas);/* w w  w. j  a v a 2  s.  com*/

    return bmd.getIntrinsicWidth();

}

From source file:Main.java

/**
 * Standardize the compression ratio i.e round off the compression ratio to
 * only 2 significant digits.//  ww  w  .  j  a  v  a2 s .  c  o m
 */
static float standardizeCompressionRatio(float ratio) {
    // round off to 2 significant digits
    int significant = (int) Math.round(ratio * 100);
    return ((float) significant) / 100;
}

From source file:Main.java

/**
 * @param context/*from   www  . j av a 2 s.co m*/
 * @param height
 * @return
 */
public static int getMetricsDensity(Context context, float height) {
    DisplayMetrics localDisplayMetrics = new DisplayMetrics();
    ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay()
            .getMetrics(localDisplayMetrics);
    return Math.round(height * localDisplayMetrics.densityDpi / 160.0F);
}

From source file:Main.java

/**
 * Get a BitmapDrawable from a local file that is scaled down
 * to fit the current Window size./* w w  w.  j a v a  2  s.  co  m*/
 */
@SuppressWarnings("deprecation")
public static BitmapDrawable getScaledDrawable(Activity a, String path) {
    Display display = a.getWindowManager().getDefaultDisplay();
    float destWidth = display.getWidth();
    float destHeight = display.getHeight();

    // read in the dimensions of the image on disk
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(path, options);

    float srcWidth = options.outWidth;
    float srcHeight = options.outHeight;

    int inSampleSize = 1;
    if (srcHeight > destHeight || srcWidth > destWidth) {
        if (srcWidth > srcHeight) {
            inSampleSize = Math.round((float) srcHeight / ((float) destHeight) * 3);
        } else {
            inSampleSize = Math.round((float) srcWidth / ((float) destWidth) * 3);
        }
    }

    options = new BitmapFactory.Options();
    options.inSampleSize = inSampleSize;

    Bitmap bitmap = BitmapFactory.decodeFile(path, options);
    return new BitmapDrawable(a.getResources(), bitmap);
}

From source file:Main.java

/**
 * Convert a dp float value to pixels/*from w  w w  . ja  va2 s  .com*/
 * @param context
 * @param dp
 * @return the responsive pixels
 */
public static int dp2px(Context context, float dp) {
    float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp,
            context.getResources().getDisplayMetrics());
    return Math.round(px);
}

From source file:Main.java

public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
    // Raw height and width of image
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {
        if (width > height) {
            inSampleSize = Math.round((float) height / (float) reqHeight);
        } else {/*from   w w  w  .j a  v  a2 s  .co  m*/
            inSampleSize = Math.round((float) width / (float) reqWidth);
        }

        return inSampleSize;
    }
    return inSampleSize;
}

From source file:Main.java

/**
 * Get a BitmapDrawable from a local file that is scaled down
 * to fit the current Window size.//from w w  w .jav  a  2s  .  c  o  m
 */
@SuppressWarnings("deprecation")
static BitmapDrawable getScaledBitmap(String path, Activity a) {
    Display display = a.getWindowManager().getDefaultDisplay();
    float destWidth = display.getWidth();
    float destHeight = display.getHeight();

    // read in the dimensions of the image on disk
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeFile(path, options);

    float srcWidth = options.outWidth;
    float srcHeight = options.outHeight;

    int inSampleSize = 1;
    if (srcHeight > destHeight || srcWidth > destWidth) {
        if (srcWidth > srcHeight) {
            inSampleSize = Math.round(srcHeight / destHeight);
        } else {
            inSampleSize = Math.round(srcWidth / destWidth);
        }
    }

    options = new BitmapFactory.Options();
    options.inSampleSize = inSampleSize;

    Bitmap bitmap = BitmapFactory.decodeFile(path, options);
    return new BitmapDrawable(a.getResources(), bitmap);
}

From source file:Main.java

/** Modify the colors translucency by alpha [0..1] with respect to the original color alpha. */
public static int applyColorAlpha(int color, float alpha) {
    final int originalAlpha = Color.alpha(color);
    // Return the color, multiplying the original alpha by the disabled value
    return (color & 0x00ffffff) | (Math.round(originalAlpha * alpha) << 24);
}